Question

How to count vector elements with even value in C++

Answer 1

#include <iostream>
#include <vector>
#include <algorithm>

using std::vector;
using std::cout;
using std::endl;

int main()
{
	vector<int> vec{ 1, 3, 8, 3, 23, 99, 12, 3, 7 };

	int even = count_if(vec.cbegin(), vec.cend(), [](int elem) { return elem % 2 == 0; });

	cout << even << endl;

	return 0;
}


/*
run:

2

*/

 

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